[Kimchi-devel] [PATCH] Eliminate name collision for feature tests' VMs

[Aline Manera]

It does not fix the problem, only workaround it.
Kimchi must not leave leftovers in the user system.

On 05/02/2015 21:15, Christy Perez wrote:
> If Kimchi's startup is interrupted for some reason, a VM created
> during the feature tests may be left defined. When this happens,
> the next time Kimchi is started it will fail with an error that
> the domain already exists (for example, "libvirtError: operation
> failed: domain 'A_SIMPLE_VM' already exists with uuid
> e6fccea8-f7ed-4320-a4cb-b85217d23985").
>
> This patch just uses the same uuid-based name scheme as was already
> in the user tests (kvmusertests.py). That gives a miniscule chance
> for name collision.
>
> Signed-off-by: Christy Perez <christy at linux.vnet.ibm.com>
> ---
>   src/kimchi/model/featuretests.py | 14 ++++++++++----
>   1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/src/kimchi/model/featuretests.py b/src/kimchi/model/featuretests.py
> index 5a45990..aa8d709 100644
> --- a/src/kimchi/model/featuretests.py
> +++ b/src/kimchi/model/featuretests.py
> @@ -24,6 +24,7 @@
>   import socket
>   import subprocess
>   import threading
> +import uuid
>
>
>   from lxml.builder import E
> @@ -35,7 +36,7 @@
>
>   ISO_STREAM_XML = """
>   <domain type='%(domain)s'>
> -  <name>ISO_STREAMING</name>
> +  <name>'%(name)s'</name>
>     <memory unit='KiB'>1048576</memory>
>     <os>
>       <type arch='%(arch)s'>hvm</type>
> @@ -57,7 +58,7 @@
>
>   SIMPLE_VM_XML = """
>   <domain type='%(domain)s'>
> -  <name>A_SIMPLE_VM</name>
> +  <name>'%(name)s'</name>
>     <memory unit='KiB'>10240</memory>
>     <os>
>       <type arch='%(arch)s'>hvm</type>
> @@ -105,8 +106,10 @@ def libvirt_supports_iso_stream(conn, protocol):
>           domain_type = 'test' if conn.getType().lower() == 'test' else 'kvm'
>           arch = 'ppc64' if platform.machine() == 'ppc64le' \
>               else platform.machine()
> +        vm_uuid = uuid.uuid1()
> +        vm_name = "ISO_STREAM_%s" % vm_uuid
>           xml = ISO_STREAM_XML % {'domain': domain_type, 'protocol': protocol,
> -                                'arch': arch}
> +                                'arch': arch, 'name': vm_name}
>           try:
>               FeatureTests.disable_libvirt_error_logging()
>               dom = conn.defineXML(xml)
> @@ -196,8 +199,11 @@ def has_metadata_support(conn):
>               domain_type = 'test' if conn.getType().lower() == 'test' else 'kvm'
>               arch = 'ppc64' if platform.machine() == 'ppc64le' \
>                   else platform.machine()
> +            vm_uuid = uuid.uuid1()
> +            vm_name = "A_SIMPLE_VM_%s" % vm_uuid
>               dom = conn.defineXML(SIMPLE_VM_XML % {'domain': domain_type,
> -                                                  'arch': arch})
> +                                                  'arch': arch,
> +                                                  'name': vm_name})
>               rollback.prependDefer(dom.undefine)
>               try:
>                   dom.setMetadata(libvirt.VIR_DOMAIN_METADATA_ELEMENT,